[PATCH RT 02/16] x86/mce: fix mce timer interval

[Steven Rostedt]

From: Mike Galbraith <bitbucket@xxxxxxxxx>

Seems mce timer fire at the wrong frequency in -rt kernels since roughly
forever due to 32 bit overflow.  3.8-rt is also missing a multiplier.

Add missing us -> ns conversion and 32 bit overflow prevention.

Cc: stable-rt@xxxxxxxxxxxxxxx
Signed-off-by: Mike Galbraith <bitbucket@xxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
[bigeasy: use ULL instead of u64 cast]
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@xxxxxxxxxxxxx>
---
 arch/x86/kernel/cpu/mcheck/mce.c |    4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/cpu/mcheck/mce.c b/arch/x86/kernel/cpu/mcheck/mce.c
index c859bb4..e51191f 100644
--- a/arch/x86/kernel/cpu/mcheck/mce.c
+++ b/arch/x86/kernel/cpu/mcheck/mce.c
@@ -1171,7 +1171,7 @@ static enum hrtimer_restart mce_start_timer(struct hrtimer *timer)
 		*n = min(*n*2, round_jiffies_relative(check_interval*HZ));
 
 	hrtimer_forward(timer, timer->base->get_time(),
-			ns_to_ktime(jiffies_to_usecs(*n) * 1000));
+			ns_to_ktime(jiffies_to_usecs(*n) * 1000ULL));
 	return HRTIMER_RESTART;
 }
 
@@ -1452,7 +1452,7 @@ static void __mcheck_cpu_init_timer(void)
 	if (!*n)
 		return;
 
-	hrtimer_start_range_ns(t, ns_to_ktime(jiffies_to_usecs(*n) * 1000),
+	hrtimer_start_range_ns(t, ns_to_ktime(jiffies_to_usecs(*n) * 1000ULL),
 			       0 , HRTIMER_MODE_REL_PINNED);
 }
 
-- 
1.7.10.4


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